33
3
Installing the Optimizer Cables
PV module
Rooftop
Optimizer
PV module
Frame mounting bracket
The front of the optimizer should be
at least 10 mm away from the rear
of the PV module. The frame
mounting bracket should be at least
20 mm away from the rooftop.
Installed on a PV Module Frame – Frame
MountingBracket (Rear-mounted)
Do not press the optimizer
mounting ear against the
positioning pole of the frame
mounting bracket.
Purchase the frame mounting
bracket separately from
Huawei.
Install the PV module after the
optimizer is installed.
1. Connect the optimizer
input power cables.
2. Connect the positive probe of the multimeter to the positive
output terminal of the optimizer and the negative probe to
the negative output terminal. Check the output voltage and
resistance of a single optimizer.
PV module
connection box
Resistance
Cause
Suggestions
0.9 kΩ ≤ R1 ≤ 1.1 kΩ The optimizer is normal.
N/A
R1 < 0.9 kΩ
If the probes of the
multimeter are correctly
connected, the optimizer is
faulty.
Replace the optimizer.
1.1 kΩ < R1
The sunlight is weak.
The optimizer input is not
connected.
The optimizer output is
connected to the PV
module output.
The optimizer is faulty.
1. Measure the resistance when the sunlight
is sufficient.
2. Connect the optimizer input power cables.
3. Correct the optimizer cable connection.
Connect the optimizer input power cables
to the output cables of the PV module.
4. If the resistance is still abnormal, replace
the optimizer.
Frame mounting bracket
•
The voltage V1 is 0 V.
•
The resistance R1 is 1 kΩ
(
±
10%).
If the probes are reversely
connected, the measured
resistance is less than the
resistance measured when the
probes are correctly connected,
which might be less than 0.9 kΩ.
